﻿using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using WeixinSB.Common;
using WeixinSB.Model;
using WeixinSB.Tools;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;

// “空白页”项模板在 http://go.microsoft.com/fwlink/?LinkID=390556 上有介绍

namespace WeixinSB.View
{
    /// <summary>
    /// 可用于自身或导航至 Frame 内部的空白页。
    /// </summary>
    public sealed partial class HongBaoPage : Page
    {
        private readonly NavigationHelper navigationHelper;
        private readonly ObservableDictionary defaultViewModel = new ObservableDictionary();


        public HongBaoPage()
        {
            this.InitializeComponent();

            this.NavigationCacheMode = NavigationCacheMode.Required;

            this.navigationHelper = new NavigationHelper(this);
            this.navigationHelper.LoadState += this.NavigationHelper_LoadState;
            this.navigationHelper.SaveState += this.NavigationHelper_SaveState;
        }

        /// <summary>
        /// Gets the <see cref="NavigationHelper"/> associated with this <see cref="Page"/>.
        /// </summary>
        public NavigationHelper NavigationHelper
        {
            get { return this.navigationHelper; }
        }

        /// <summary>
        /// Gets the view model for this <see cref="Page"/>.
        /// This can be changed to a strongly typed view model.
        /// </summary>
        public ObservableDictionary DefaultViewModel
        {
            get { return this.defaultViewModel; }
        }

        /// <summary>
        /// Populates the page with content passed during navigation. Any saved state is also
        /// provided when recreating a page from a prior session.
        /// </summary>
        /// <param name="sender">
        /// The source of the event; typically <see cref="NavigationHelper"/>.
        /// </param>
        /// <param name="e">Event data that provides both the navigation parameter passed to
        /// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested and
        /// a dictionary of state preserved by this page during an earlier
        /// session.  The state will be null the first time a page is visited.</param>
        private async void NavigationHelper_LoadState(object sender, LoadStateEventArgs e)
        {
            // TODO: Create an appropriate data model for your problem domain to replace the sample data.
            //var item = await SampleDataSource.GetItemAsync((string)e.NavigationParameter);
            //this.DefaultViewModel["Item"] = item;
        }

        /// <summary>
        /// Preserves state associated with this page in case the application is suspended or the
        /// page is discarded from the navigation cache.  Values must conform to the serialization
        /// requirements of <see cref="SuspensionManager.SessionState"/>.
        /// </summary>
        /// <param name="sender">The source of the event; typically <see cref="NavigationHelper"/>.</param>
        /// <param name="e">Event data that provides an empty dictionary to be populated with
        /// serializable state.</param>
        private void NavigationHelper_SaveState(object sender, SaveStateEventArgs e)
        {
            // TODO: Save the unique state of the page here.
        }

        /// <summary>
        /// 在此页将要在 Frame 中显示时进行调用。
        /// </summary>
        /// <param name="e">描述如何访问此页的事件数据。
        /// 此参数通常用于配置页。</param>
        protected async override void OnNavigatedTo(NavigationEventArgs e)
        {
            topTime.Text = DateTime.Now.ToString("HH:mm");

            await Windows.UI.ViewManagement.StatusBar.GetForCurrentView().HideAsync();

            receive.DataContext = HongBaoReceiveModel.Get();
            send.DataContext = HongBaoSendModel.Get();
        }

        private void Edit_Click(object sender, RoutedEventArgs e)
        {
            Frame.Navigate(typeof(HongBaoEditPage));
        }

        private async void Save_Click(object sender, RoutedEventArgs e)
        {
            await PicLibrary.Save(LayoutRoot);
            MessageIn.Begin();
        }

        private void Item_Click(object sender, ItemClickEventArgs e)
        {
            var lv = sender as ListView;
            if (lv != null)
            {
                lv.SelectedIndex = -1;
            }
        }
    }
}
